This switch is not root for vlan 5, hence he is blocking. This switch sees the root on port 2/1-2 (and the root has a different mac than the local switch). The blocked port is 1/1-2. Ports 1/1-2 are blocked, ports 2/1-2 are forwarding. The other end of the link is root, and it is still in forwarding state on both trunks. If the secondary switch didn't block one end, there would be a loop.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.